Vimal Jyothi Engineering College Learning Management System

2K6AEI404: SIGNALS AND SYSTEMS

This course deals with the fundamentals of signals and systems analysis. Signals are all information that are detectable or measurable. It is a function representing some variable that contains some information about the behavior of a natural or artificial system. Signals are one part of the whole. Signals are meaningless without systems to interpret them, and systems are useless without signals to process.

A signal can be represented as a function x(t) of an independent variable t which usually represents time. If t is a continuous variable, x(t) is a continuous-time signal, and if t is a discrete variable, defined only at discrete values of t, then x(t) is a discrete-time signal. A discrete-time signal is often identified as a sequence of numbers, denoted by x[n], where n is an integer.

A System is any physical set of components that takes a signal and produces a signal. In terms of engineering, the input is generally some electrical signal X, and the output is another electrical signal(response) Y. However, this may not always be the case. Consider a household thermostat, which takes input in the form of a knob or a switch, and in turn outputs electrical control signals for the furnace.

Note to the Students:

There will be 3 lecture classes and one tutorial every week. All students are requested to carry 2 notebooks, one for writing lecture notes and examples done in lecture classes and another for solving tutorial problems and home works.

COURSE OBJECTIVE

To understand the terminology of signals and basic engineering systems.

To make students able to give Fourier representation of a continuous-time signal.

To make students able to give Fourier representation of discrete time signal.